7bc75911   
   From: ckraftSPAMTRAP@west.net   
      
   On Thu, 12 Jan 2012 12:49:34 -0800 (PST), RichD   
    wrote:   
      
   >I was looking at some LED flashlights, with ratings   
   > from 50 to 150 lumens.  A p-n junction is a p-n   
   > junction, how do they get such varied outputs?   
   >   
   >I examined the working end, they all look alike,   
   >with a single bulb.   
      
      
   Do they still put multiple diodes inside a single package?  I had some   
   red 2 Watt LEDs, surplus stock in the early 1970s, that had either 12   
   or 16 actual diode chips inside the one LED package.  I drove them at   
   2 amps, about 1 volt.   
      
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